HDD sound diagnosis

Hey all, so I recently stumbled across this very useful site, which has audio tracks of a lot of noises which come from a HDD. These noises are the sounds a failing drive will often make.
so, take a listen to some track(s) of your specific drive(s) on the site, then pop open your computer and see if it's making a similar noise.
If it is, back up all your important data, for the end is nigh.
Hope this will help some of you!